Pittosporum: When to prune?
Got a pittosporum whose top is reaching the guttering of our house, which must be a good 20ft or more high. We want to lower it, most likely by at least a third of it's current height, so probably down to about 10ft. No real interest in it's width being tidied, apart from a little trim perhaps. I've done a quick google but got a little confused, with several different opinions on when is best and also me not knowing the exact type of pittosporum we have. Does that matter a lot to the pruning what type it is? All I can say is that when it flowers, which it's just finished, the flowers are very dark in colour. They could be black, or a very dark purple/red/blue. Certainly they are dark. So, when's best to prune it down by a third? And is a third of it's height in one go a good idea? Thanks